Development of a lightweight active optic system for a spaceborne relay mirror application

Mark S. Janosky

doi:10.1117/12.55734

1 November 1990 Development of a lightweight active optic system for a spaceborne relay mirror application

Mark S. Janosky

Author Affiliations +

Optical Engineering, Vol. 29, Issue 11, (November 1990). https://doi.org/10.1117/12.55734

Abstract

The design and performance of an active optic figure control system for a spaceborne relay mirror application is described. Development centered on minimizing overall system weight while meeting a prescribed set of figure control requirements. The optic, an Ultra Low Expansion ULE, lightweight, 17 in. hexagonal mirror, uses a combination of moment and force actuators to control the optical figure. Modeling of the mirror to determine the placement of the actuators that minimizes the rms aberrations at low spatial frequencies is discussed. It is shown that the actuator configuration chosen is capable of significantly correcting all primary Zernike terms up to trefoil (i.e., focus, tilt, power, coma, astigmatism, and trefoil) with the exception of spherical. Preliminary "manual" closed loop operation of the system has demonstrated that the static optical figure of 2.5 waves peak-to-valley and 0.4 wave rms can be corrected to 0.5 wave peak-to-valley and 0.1 wave rms.

Citation Download Citation

Mark S. Janosky "Development of a lightweight active optic system for a spaceborne relay mirror application," Optical Engineering 29(11), (1 November 1990). https://doi.org/10.1117/12.55734

Published: 1 November 1990

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